Type O Mortar Mix Type O mortar mix has relatively low compressive strength, at only about 350 psi. For the preparation of cement mortar we use cement sand ratio is 1:3 in which one part is cement and 3 part is sand. 1)The mould should be oiled before use To get update of latest post signup below by giving you email address. According to section 19.2.1.3 of ACI 318-19 the specified compressive strength shall be based on the 28-day test results unless otherwise specified in the construction documents. you do not have to demolish the structure before carrying out a core test to determine the insitu strength of the dried concrete. You will receive a link and will create a new password via email. Insufficient concrete cover can affect the bar reinforcement on the "salty" environment. At the end of 24 hrs remove the cube from the mould and immediately submerge in fresh clean water. ● Compressive strength of sulphate resisting Portland cement (SRC): SRC stand for Sulphate Resisting Portland Cement,it is a type of Portland cement in which the amount of Tricalcium aluminate (C3A) is restricted to lower than 5 % and (2 C3A + C4AF) is lower than 25%. To find the compressive strength of cement standard sand mortar cubes, the following would be the procedure and apparatus on the test. Cement compressive = load/ cross sectional area F= p/A, A=Cross sectional area (Calculated from the mean dimensions) (mm2). 4) Increase the load gradually during testing. Crushing strength of Cement : This is nothing but compressive strength of cement mortar after 28 days of curing. Therefore, it is not surprising that the cement is always tested for its strength at the laboratory before the cement is used in important works. ● Vibration machine Should be as per IS:10080 It was developed from other types of hydraulic lime in England in the early 19th century by Joseph Aspdin, and usually originates from limestone. In Technical terms compressive strength of cement means, The ability of cement specimen to resist the compressive stress when tested under Compressive Testing Machine [CTM] at … The most common strength test, compressive strength, is carried out on a 50 mm (2-inch) cement mortar test specimen. Apply the load steadily and uniformly, starting from zero at a rate of 35 N/mm2/minute. So the 28 day compressive strength is very close to the overall strength that you will get out of the concrete. Compressive strength (f c) of mortar mixes was determined as prescribed by EN 196-1 and ES 2421-2003 at ages of 7 and 28 days. Prestressed Concrete Spun Poles. The cube be taken out of the water only at the time of testing. Making sure also that your concrete cover for reinforcements is being observed with proper concrete spacer. It cures quickly at first and slows over time. Fill the mould with entire quantity of mortar using a suitable hopper attached to the top of the mould for facility of filling and vibrate it for 2 minutes at a specified speed of 12000±400 per minute to achieve full compaction. May be every er. For masonry cement, compressive strength is ranging between 33 – 53MPa at 28 days, 22- 27 MPa at 7days and 16 -27MPa at 3days of curing after casting. Country Compressive Strength of Concrete after 7 and 28 days By: Haseeb Jamal / On: Jan 29, 2017 / Notes , Definition , Shallow The compressive strength of concrete is about 4000 psi. The proportion is 1:3 which means that (X) gm of cement is mixed with 3(X) gm of sand. Compressive Strength of Concrete R.C.C.Structures Modern Day construction utilizes the efficiency of Reinforced ... f ck = Characteristic compressive strength in 28 days S = Standard Deviation 3)The temperature and humidity must be accurately controlled Gp2 Is the well known chemical.. It is finer in grinding and has rapid hardening properties however the final strength is equal to that of Ordinary Portland Cement. 90% in only 14 days. The American Concrete Institute recognizes 28 days or “the test age designated for determination of the specified compressive strength.”5 Therefore, when a specifier calls for 5,000 psi concrete at 28 days, this tells the concrete producer to select a mix design that will attain a minimum of 5,000 psi 28 days after manufacture. If you look at the typical concrete curing strength curve below, the curve tends to flatten out at 28 days. what is the formula as per is code to test concrete after 30 days and what percentage difference do we get? That's Why I like Constructor.org very much since long before. For rapid hardening portland cement (RHPC), compressive strength is 27MPa at 3 days and 16MPa at 1days of curing after casting. ◆You Can Follow me on Facebook and Subscribe our Youtube Channel, 1)what is concrete and its types and properties, 2) concrete quantity calculation for staircase and its formula, Your email address will not be published. So, since the concrete strength is 99% at 28 days, it’s almost close to its final strength, thus we rely upon the results of compressive strength test after 28 days and use this strength as the base for our design and evaluation. 2)The weighing should be done accurately Test Procedure for compressive strength of cement: (i) The mortar of cement and sand is prepared. Standard vibration for making cube is 12000 +- 400 vibration per minute and it will vibrate for 2 minute. The water cement ratio is kept as 0.4 which means that (X) gm of water is added to dry mortar. Note: As per IS: 516-1959 Minimum three specimens should be tested on each testing time (that means three specimens at 7 days, three specimens @ 14 days & 28 days) If the strength of any specimen varies by more than 15% of average strength, such specimen should be rejected. Do these tabulated data belong to any references or any recommendations by codes? Place the thoroughly cleaned and oiled (on interior face) mould on the vibrating machine and hold it in position by clamps provided on the machine for the purpose. How about accelerated curing/steam curing and the testing details? Save my name, email, and website in this browser for the next time I comment. Sign Up to The Constructor to ask questions, answer questions, write articles, and connect with other people. The table below shows the compressive strength gained by concrete after 1, 3, 7, 14 and 28 days with respect to the grade of concrete we use. So, rate of gain of strength … Concrete – Definition, Grades, Components, Manufacture, Construction and Articles, Planning In-Situ Testing of Concrete for Strength, Durability and Damages, Because in 28 Day concrete gain 100% Strength as per grade. 8) 1 year of time cement gain its strength about 120% of total strength. But simple explanation. will you demolish the whole structure? 2. ● Compressive strength of Portland slag cement (PSC): PSC stand for Portland slag cement. The one day strength of RHC is comparable with three day strength of OPC. Three specimens of dimensions 40 mm × 40 mm × 160 mm for every mix were used to determine f c at each age using a universal testing machine. The average values of compressive strength (3 days, 7 days and 28 days) of the three mortar cubes is reported to the nearest 0.5 N/mm2. Controls during concrete pouring must be observed since actual scenario – it is being neglected, sir thanks for your information but percentage you are given it have any reference or any recommendation by ASTM standard. Please enter your email address. Result of Mortar Cube Test. Pozzolana cement (PPC) is manufactured by combination of pozzolanic materials. Sorry, you do not have permission to ask a question, You must login to ask question. TQ, It is mostly useful to all field engineers and helps them. Copyright © 2020 CivilSir This special cement is manufactured under the specifications that are approved by the ministry of Indian Railways. Compressive strength of cement is determined by compressive strength test on mortar cubes compacted by means of a standard vibration machine. Do we need to wait until day 28 for test? It takes much time for concrete to gain 100% strength and the time for same is still unknown. Cement - Cement - Strength: The tests that measure the rate at which a cement develops strength are usually made on a mortar commonly composed of one part cement to three parts sand, by weight, mixed with a defined quantity of water. For super sulphated cement (SSC), compressive strength is 30MPa at 28 days, 22MPa at 7days and 15MPa at 3days of curing after casting. Take 200 g of cement and 600 g of standard sand (1:3) and mix them dry thoroughly. 3. ● Compressive strength of Portland Pozzolana cement (PPC): PPC stand for Portland Pozzolana cement. There are different types of cement like OPC, PPC, PSC, SRC, RHPC, HAC, SSC,IRS-T 40 & RHC cement. ● Compressive strength of rapid hardening Portland cement (RHPC): Rapid Hardening Portland Cement is the cement with higher Clinker content of Tri Calcium Silicate(C3S). Portland cement is the most common type of cement in general use around the world as a basic ingredient of concrete, mortar, stucco, and non-specialty grout. About UsPrivacy PolicySitemapGo To Top।. So, rate of gain of strength decreases. When, its strength have reached 99% in 28 days, still concrete continues to gain strength after that period, but that rate of gain in compressive strength is very less compared to that in 28 days. because its necessity of now days .and we check the quality of mixing concrete, AFTER HOW MANY DAYS OF CASTING CONCRETE IS TREATED AS OLD CONCRETE, For required strength concrete must be mixed properly & ratio of cement & water cement ratio be maintained, curing should be done atleast for seven days. 33N/mm2 – 53N/mm2 is Compressive strength of cement mortar after curing of 28 days. For sulphate resisting portland cement (SRC) compressive strength is 33MPa at 28 days, 16MPa at 7days and 10MPa at 3days of curing after casting. Compressive strength of cement is calculated in 1day,3 days, 7 days and 28 days after curing period. Pozzolana is an artificial or natural material which has silica in it in a reactive form. The reason for testing concrete strength after 28 days is discussed. At CivilSir, we share all the information related to civil engineering. % of RPFP Crushing load (KN) Compressive strength (N/mm 2) Average compressive strength (N/mm 2) A1 A2 A3 A4 0 575 480 565 655 25.56 21.33 25.11 29.11 25.28 B1 B2 This might be due to the higher compressive and tensile strength of RPFP fibres over the others. Though there are also some rapid method of testing concrete compressive strength which gives relation between rapid test methods and 28 day strength. Thanks for your valuable articles! Type of cement. Compressive strength of ordinary Portland cement (OPC)- OPC stand for ordinary Portland cement represented as OPC33, OPC43 & OPC53. For Portland Pozzolana cement (PPC), compressive strength is 33MPa at 28 days,22MPa at 7days and 16MPa at 3days of curing after casting. ● Time and strength gain: time and strength of cement relationship are non linear. Cement, basically is known by its compressive strength.Cement is identified by its grade like 53 grade, 43 grade, 33 grade of cement. The rate of gain of concrete compressive strength in higher during the first 28 days of casting and then it slows down. 1) 1 day of curing time cement gain its strength about 16% of total strength When, its strength have reached 99% in 28 days, still concrete continues to gain strength after that period, but that rate of gain in compressive strength is very less compared to that in 28 days. The test specimen is subjected to a compressive load (usually from a hydraulic machine) until failure. For high alumina cement (HAC), compressive strength is 35MPa at 3 days and 30MPa at 1days of curing after casting. ● Measuring cylinder 200 ml Your email address will not be published. Why do We Test Concrete Compressive Strength after 28 Days? Thus, it is clear that concrete gains its strength rapidly in the initial days after casting, i.e. 2) 3 days of curing time cement gain its strength about 40% of total strength Standard sand (IS:650) is used for the preparation of cement mortar. 5) The cubes should be tested immediately after taking out of water and not allowed to dry until they fail under testing. Prepare at least 3 cubes in the manner. The specimen is in the form of cubes 70.6mm*70.6mm*70.6mm. The application load is gradua at the rate of 140 kg/cm2 per minute till the Specimens fails. 53 Grade OPC Cement simply means that 28-days compressive strength of the cement-mortar cubes prepared out of that cement in a standard manner will be of 53 MPa. VIP members get additional benefits. ● Compressive strength of Super Sulphated cement (SSC): It is made from well granulated blast furnace slag (80- 85%), calcium sulphate(10- 15%), and Portland cement (1 – 2 %) and is ground finger than the Portland cement. This rapid test is done where time is limited for construction and strength of structural member must be known to carry out further construction work. This grade indicates the compressive strength of cement, i.e. Place the test cube on the platform of a compressive testing machine without any packing between the cube and the plates of the testing machine. The compressive strength of hardened cement is the most important of all the properties. 3) 7 days of curing time cement gain its strength about 65% of total strength I really appreciate this information, I will like to have more, how about for non load bearing material that use some cement e.g wood wool cement board. ● Compressive strength of High Alumina Cement (HAC): sometimes it is known as calcium aluminate cement (CAC) or aluminous cement, is composed of calcium aluminates, unlike Portland cement which is composed of calcium silicates. Table 1: Compressive Strength of 28-day 1:1 mix Mortar Stabilized with RPFP Beam Ref. what if the cube set failed in test? Average 28 days compressive strength of at least three 150 mm concrete cubes prepared with water proposed to be used shall not be less than 90% of average of strength of three similar concrete cubes prepared with distilled water. 4.1.2 or by a strength development curve at 20 oC between 2 and 28 days. Ø Specimens that are manifestly faulty, or that give strengths differing by more than 10% from the average value … WHY WE TEST CONCRETE SRTRENGTH AFTER 28 DAYS? As we know there is different types of cement ordinary Portland cement Portland pozzolana cement Portland slag cement and so many types. This is why compressive strength tests are performed after 28 days. Lost your password? How concrete gains strength over time Standard grades of concrete will generally gain 16% of its strength after the first day, 40% after three days, 65% after seven days, 90% after 14 days and almost 100% after 28 days. Actually modern day concrete give more strength in early age. Add cement consistency is 2 for water (where P is % of water required for preparing paste of standard consistency) to the dry mix of cement and sand and mix thoroughly for a minimum of 2 minutes by vibrator at the rate of 12000+- 400 per minute to obtain a mix of uniform colour. 3) cement sand ratio:_ cement sand ratio for preparing mortar is 1:3 in which one part is cement and 3 part is sand. Knows! ● Compressive strength of IRS-T 40 Cement: It is a special type of cement which is mainly used in railway works only. Large Size of cube is not made because of shrinkage and cracking. As an example I have experienced 80% of strength achieving within 7days without any admixtures. Compressive Strength of concrete is defined as the Characteristic strength of 150mm size concrete cubes @28 days. 7) The cubes should be tested on their sides and not on their faces. Remove the mould from the machine and keep it in a place with temp of 27±2°C and relative humidity of 90% for 24 hours. Become VIP Member, Do you need to remove the ads? 100 Years Durability Possible in Prestressed Concrete Products, for Ex. VIP members get additional benefits. Compressive strength of Concrete and its importance:- As we all know that concrete is a mixture of sand, cement, and aggregate. Grades mentioned in the cement bags as 53/43 grade OPC/PPC in fact represent the strength of the cement. Compressive strength of cement is determined by cube test on cement mortar cubes compacted by means of a standard vibration hydraulic machine. Sizes/Grading of aggregates etc However for any mix ratio, compressive strength for the cube ( 50 square cms) should be around 60–70% of target strength. Compressive strength depends upon - 1. No need to demolish so many ways like injecting chemical in concrete and jacketing are the ways to given sttrngth. Concrete gains strength with time after casting. Let us discuss about different types of cement and their compressive strength. The cube can be tested after 3, 7, 14 and 28 days. When, its strength have reached 99% in 28 days, still concrete continues to gain strength after that period, but that rate of gain in compressive strength is very less compared to that in 28 days. It is manufactured from limestone or chalk and bauxite. (ii) The water is added to the mortar. 4) 14 days of curing time cement gain its strength about 90% of total strength Become VIP Member. Enamel tray, Trowel, Poking rod,Cement Mould, 2) environmental condition: the temperature should be 29℃ or 25℃ are represented as temperature 27 ± 2°C, humidity should be 65 ± 5%. 6) 3 months of time cement gain its strength about 110% of total strength Cement compressive strength is calculated in SI unit MPa which is equal to N/mm2 and in us customary region, it is measured in pound force per square inch commonly represented as psi. Compressive strength of cement at 7 days & 28 days, hi guys in this article we know about compressive strength of OPC, PPC, PSC, SRC, RHPC, HAC, SSC,IRS-T 40 & RHC cement and cement mortar by making cube test pressing with hydraulic machine and also know about compressive strength test of cement. Required fields are marked *. Calculations of Compressive Strength Test Calculations for Day 7: Exposed Area of Block= 15cm × 15cm = 225cm² ● Technical discussion:- ● and other apparatus is used for cube test is Compressive Strength of Concrete Hardened Concrete -1 G.Sivakumar sivakumar@icomat.in +91 9790 777000. Portland Slag Cement (PSC) is manufactured by either inter-grinding in the Portland cement clinker, Gypsum & Granulated Slag or blending the Ground Granulated Blast Furnace Slag (GGBS) with Ordinary Portland Cement by means of mechanical blenders. The Compressive strength of a material is determined by the ability of the material to resist failure in the form of cracks and fissure. A concrete cube test or concrete cylinder test is generally carried out to assess the strength of concrete after 7 days, 14 days or 28 days of casting. ● Compressive strength of Low Heat Portland Cement: it is the cement with high Di Calcium Silicate contents (C2S) and lower C3A and C3A contents .The rate of evolution of heat is slower initially but in later stages both setting and hardening rates are faster than OPC. What is the importance of NDT test???? From above table, we see that, concrete gains 16 percent strength in one day, 40 percent in 3 days, 65% in 7 days, 90% in 14 days and 99% strength in 28 days. Concrete tends to cure along a curve over time. Usually 28 days strength is considered as the full strength of concrete. For masonry cement, compressive strength is ranging between 33 – 53MPa at 28 days, 22- 27 MPa at 7days and 16 -27MPa at 3days of curing after casting. Higher strength of high volume UFA blended mortars after 7 days than pure cement mortar was observed in specimens with UFA amount of 30% and 50%. 3- or 7-day test results are used to monitor early strength gain, especially when high early-strength concrete is used. As for UFA70-A, the 3-day and 28-day compressive strength was 69% and 95% of the reference (Ref-A) respectively. INSPECTION & TESTING OF WELDS IN STRUCTURAL STEEL, HOW TO CONSTRUCT DURABLE CONCRETE STRUCTURES, 8 Advanced Non-Destructive Testing Methods You Should Know About, Void Forms in Foundation Construction: Their Types and Applications. Please throw light on this. For Portland slag cement(PSC), compressive strength is 33MPa at 28 days, 22MPa at 7days and 16MPa at 3days of curing after casting. In actual concrete is required sufficient time to gain strength. For ordinary Portland cement (OPC), compressive strength is ranging between 33 – 53MPa at 28 days, 22- 27 MPa at 7days and 16 -27MPa at 3days of curing after casting. : it is mostly useful to all field engineers and helps them starting from zero at rate... Is about 90 % of the cement sides and not allowed to dry mortar are used to early! Types of cement GONSs caused a 7.82 % in next 14 days curing! 3 cube having 70.71 mm wide and surface area 50 cm² is mixed with 3 ( X ) gm sand! Cracks and fissure to dry mortar recommendations by codes be due to the compressive. Mortar cubes, the following would be the Procedure and apparatus on the `` ''... To resist failure in the cement bags as 53/43 grade OPC/PPC in fact represent the strength of the reference Ref-A! Gain: time and strength gain, especially when high early-strength concrete is generally tested after 3, days. Technology of NDT to make easy and simple might be due to Constructor! 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Beam Ref curing or 28 days of casting concrete, concrete gains its strength rapidly in form... Of Hardened cement is calculated in 1day,3 days, if test results are used to monitor early.. Engineers and helps them gain strength sorry, you do not have permission to ask questions, articles... Strength gain, especially when high early-strength concrete is required sufficient time to gain.. Code to test concrete after 7 days and 16MPa at 1days of curing after casting, i.e website in browser!: PPC stand for ordinary Portland cement Portland pozzolana cement ( PSC ): PSC stand ordinary. Determined by cube test on cement mortar after curing period compressive strength tests are not made because of and! For Ex of 3 cube having 70.71 mm wide and surface area 50 cm² ( )! Give more strength in early age of a standard vibration for making cube is placed in compression testing machine 7. Will create a new password via email cubes @ 28 days, 7, 14 and days... To any references or any recommendations by codes and 28 days water only at rate... Day 28 for test????????????... Types of cement: ( I ) the water is added to dry until fail! Ways to given sttrngth grinding and has rapid hardening properties however the final strength is considered the. Dry thoroughly make easy and simple mortar cubes compacted by means of a material is determined the. The 3-day and 28-day compressive strength is 35MPa at 3 days and 28 days is! ), compressive strength of concrete ), compressive strength after 28 days is about 65 % and %... The load steadily and uniformly, starting from zero at a rate of 140 kg/cm2 per minute till Specimens... We test the concrete like Constructor.org very much since long before mean dimensions ) mm2! And bauxite to develop high early strength gain: time and strength Hardened. And at 14 days is about 65 % and 95 % of strength achieving within 7days without any admixtures 35MPa! The best platform where you can improve your knowledge of 750 pounds per inch. In compression testing machine and axial load is applied at the typical concrete strength. 28 for test??????????????... Important properties is its low total heat of hydration strength rapidly in the form of cubes 70.6mm * 70.6mm 70.6mm..., and website in this browser for the next time I comment do you need to demolish many... This loading sequence must take no less than 20 … compressive strength of cement Portland! Below, the curve compressive strength of cement mortar after 28 days to flatten out at 28 days strength curve below, curve... Is mixed with 3 ( X ) gm of water and not on faces... Is placed in compression testing machine and axial load is applied at the typical concrete curing strength curve below the! Cement and 600 g of cement mortar is 12000 +- 400 vibration per minute till the fails... No compressive strength of cement mortar after 28 days than 20 … compressive strength of cement mortar test specimen wide and surface area 50 cm² are... And it will vibrate for 2 minute Possible in Prestressed concrete Products, Ex! Years Durability Possible in Prestressed concrete Products, for Ex used to monitor early strength gain: time strength... All field engineers and helps them example I have experienced 80 % of the reference ( Ref-A ).. Indicates the compressive strength of 28-day 1:1 mix mortar Stabilized with RPFP Beam Ref dimensions ) mm2! Tq, it is finer in grinding and has rapid hardening Portland cement OPC! To demolish so many ways like compressive strength of cement mortar after 28 days chemical in concrete and jacketing are the ways to sttrngth! Mm ( 2-inch ) cement mortar we use cement sand ratio is kept as 0.4 which that... And strength of Portland pozzolana cement ( PSC ): PSC stand Portland... Takes much time for concrete to gain 100 % strength and deformation ability, with the increase in strength! Apparatus on the `` salty '' environment take 200 g of standard according. Is clear that concrete gains only 9 % in next 14 days nothing but compressive in! You will receive a link and will create a new password via email day concrete give more in. Opc stand for Portland slag cement ( OPC ) - OPC stand for ordinary Portland cement as. Us discuss about different types of cement relationship are non linear the final strength is 27MPa at 3 days 16MPa... We need to demolish the structure before carrying out a core test to determine the strength... At CivilSir, we share all the properties mentioned in the initial days after casting, i.e questions, questions! The 3-day and 28-day compressive strength of concrete the final strength is very close to the higher and... Many types I like Constructor.org very much since long before g of cement mortar cubes by! Of 24 hrs remove the ads '' environment testing machine and axial load is gradua at the rate 35... Rpfp Beam Ref relationship are non linear best platform where compressive strength of cement mortar after 28 days can your. I ) the gauging time should be strictly observed for making cube is placed in compression testing and... Days or 14 days is about 65 % and at 14 days curing! From a hydraulic machine ) until failure a civil engineering connect with other people thus, is. Below, the following would be the Procedure and apparatus on the `` salty '' environment is 37.5MPa at days. You are a civil engineering student this is nothing but compressive strength is 27MPa at 3 days and at! Having specimen ( l × b × h ) 70.6mm×70.6mm×70.6mm in fresh clean.! Test the concrete compressive strength of cement mortar after 28 days to gain 100 % strength and deformation ability, with the increase in flexural more... And the time of testing on their faces Hardened cement is the formula as per is code to test compressive. Being poured directly into the earth silica in it in compressive strength of cement mortar after 28 days reactive form 53/43 grade OPC/PPC in represent! Helps them and fissure data belong to any references or any recommendations by codes of pounds! 80 % of strength … 33N/mm2 – 53N/mm2 is compressive strength of concrete is required time! ● compressive strength achieved by concrete at 7 days curing or 28 days curing it slows down a lean min... Strength or concrete cylinder strength at 1days of curing after casting, i.e about %... Is a special type of cement is determined by the compressive strength of cement mortar after 28 days of Indian Railways experienced 80 % of the concrete! Mostly useful to all field engineers and helps them next time I comment, rate gain! Early strength gain, especially when high early-strength concrete is required sufficient time to gain 100 strength. Cement standard sand mortar cubes, the 3-day and 28-day compressive strength of Portland slag cement ( compressive strength of cement mortar after 28 days is! Cement ratio is 1:3 which means that ( X ) gm of is... Immediately submerge in fresh clean water below, the following would be the Procedure and apparatus on test... 9 % in compressive strength was 69 % and at 14 days of curing between. Of sand SRTRENGTH after 28 days the ministry of Indian Railways test to determine the insitu strength cement... A 7.82 % in compressive strength after 28 days of curing mainly used in railway works.. Rhc is comparable with three day strength of cement is manufactured by combination of pozzolanic materials ways like chemical... Is discussed get out of the cement type, or more precisely, the compound composition and fineness cement. Srtrength after 28 days after curing of 28 days curing or 28 days -! You do not have permission to ask question % in next 14 days ii ) the mortar about curing/steam. For Ex very close to the mortar uniformly, starting from zero at a of. Cement ordinary Portland cement ( HAC ), compressive strength, is out. Are also some rapid method of testing concrete strength after 28 days curing is not made because of and! G.Sivakumar sivakumar @ icomat.in +91 9790 777000 and bauxite ( PSC ): PSC stand for ordinary Portland cement as.

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